Definition of belemnite
1 : any of various extinct cephalopods (order Belemnoidea) especially abundant in the Mesozoic era that had internal shells and that superficially resembled and are regarded as ancestors of the squids
2 : the fossilized bullet-shaped remains of a belemnite
Origin and Etymology of belemnite
Learn More about belemnite
Britannica.com: Encyclopedia article about belemnite
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